The present invention relates to curatives for epoxy resins, and compositions (e.g. adhesives) containing such resins cured using the same methods of preparation and uses therefor. More specifically, the present invention relates to hybrid curatives for epoxy resins comprising both aromatic amine, phenol and/or phenyl ester moieties. A further aspect of the current invention relates to new imidazole catalysts that possess a combination of excellent cure latency as well as low cure temperature onset.
New Kemp’s Diacid Derivatives Give Efficient Transport and Modifiable Selectivity for Alkaline Earth and Transition Metal Ions
作者:Bruce W. Baldwin、Takuji Hirose、Zhen-He Wang、Tadafumi Uchimaru、Ari Yliniemelä
DOI:10.1246/bcsj.70.1895
日期:1997.8
New derivatives of 1,3,5-trimethyl-r-1, c-3, c-5-cyclohexanetricarboxylic acid (Kemp’s triacid) showed high efficiency for alkalineearth and transition metal ion transport through a chloroform liquid membrane. Simple syntheses from Kemp’s triacid or its geometric isomer provided chelating agents with a tripodal binding site for metal cations. The tripodal binding site consisted of r-1, c-3-diaxial
Improved microwave oven synthesis of amides and imides promoted by imidazole; convenient transport agent preparation
作者:Bruce W. Baldwin、Takuji Hirose、Zhen-He Wang
DOI:10.1039/cc9960002669
日期:——
Microwave dielectric loss heating without solvent or support yields amides and imides from aromatic and sterically hindered acids in the presence of imidazole in good to excellent yields under mild irradiation conditions.
Synthesis and Evaluation of Superior Calcium and Mercury Transport by Simple Monocarboxylic Acids of Kemp’s Triacid
作者:Takuji Hirose、Zhen-He Wang、Bruce W. Baldwin、Tadafumi Uchimaru、Kazuyuki Kasuga
DOI:10.1246/bcsj.72.865
日期:1999.4
Transport abilities of alkaline earth, transition, and heavy metal ions were examined for three kinds of disubstituted monoacid derivatives of Kemp’s triacid as transport agents for a liquid membrane system. Diamide derivatives showed high transport ability for CaII over MgII, with selectivity ratios greater than 25. Imide monoacids were also CaII selective. For transition and heavy metal ions, all monoacids including diester monoacid showed very high HgII transport, but with different selectivities depending on the functional group. High HgII/AgI ( = 24), HgII/CuII ( = 194), and HgII/PbII ( = 85) selectivities were observed for diamide, diester, and imide monoacids, respectively. The transport mechanisms are discussed for alkaline earth, transition, and heavy metal ions utilizing ion chromatography analysis of anions co-transported.
Modification of Kemp’s Triacid to Produce New Ligands Showing Efficient Alkaline Earth Metal Ion Transport with Structure Dependent Selectivity
作者:Bruce W. Baldwin、Takuji Hirose、Zhen-He Wang、Tadafumi Uchimaru、Ari Yliniemelä
DOI:10.1246/cl.1996.415
日期:1996.6
The calcium/barium selectivity ratio for efficient competitive transport among alkalineearth metal ions was controlled by structural isomerism and side chain linker changes in new lipophilic mono-substituted Kemp’s diacid ionophores.